BPN-30 "Kozara" (Special-Purpose Ship)
The first sub-echelon of vessels consists of the flagship - the RPB-111 river patrol vessel, and the special-purpose ship BPN-30 "Kozara."
This sub-echelon is commanded by Corvette Captain Vladimir Milić.
The flag of the Riverine Flotilla is carried by Lieutenant Commander Dragan Stojiljković
BPN-30 "Kozara" (Special-Purpose Ship)

The BPN-30 "Kozara" serves as the command vessel for the Riverine Flotilla and is also used as a protocol vessel for the Ministry of Defense. In addition to its primary purpose, it acts as a base ship for logistical support to the Riverine Flotilla's floating units and for training cadets from the Military Academy. It can also be used for both longitudinal and transverse transport as needed.
Constructed from steel, it has dimensions of 67m x 9.5m x 13.6m x 1.30m, with a displacement of 600/550 tons. It is powered by two 250 kW (340 hp) Končar electric propulsion motors, two 492 kW (669 hp) Caterpillar diesel generators, and a 90 kW (120 hp) bow propeller. It reaches a maximum speed of 19/13 km/h upstream and 25/20 km/h downstream. It is armed with a 20/3 anti-aircraft gun. The vessel was built in Linz, Austria, in 1939.